Tender For procurement of spares for pressure parts of units 4 to 7 boilers of rtps - tube dia 44.5 x 4.5 mm, tube dia 44.5 x 5 sa 213 t 11, tube dia 44.5 x 5 sa 210 gr.a, tube dia 51x4.5 sa 209 t1, fin flat -size 12.7 x 6 mm, tube_ dia 63.5 x 5.6 sa210 gr.c